Study on Chemical Bonding Between Epoxy Coating and Metal Substrate Using gamma-Aminopropyltrimethoxysilane to Modify Epoxy Resin Molecule

doi:10.11900/0412.1961.2018.00121

IMR OpenIR

	Study on Chemical Bonding Between Epoxy Coating and Metal Substrate Using gamma-Aminopropyltrimethoxysilane to Modify Epoxy Resin Molecule
	Cao Fachun 1,2; Wu Hang 3; Yang Yange 1,4; Cao Jingyi 4; Zhang Tao 1,3; Wang Fuhui 3
通讯作者	Wu Hang(wuhang@mail.neu.edu.cn) ; Yang Yange(ygyang@imr.ac.cn)
	2019-02-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	55 期号:2 页码:238-248
摘要	Epoxy coatings are widely used to protect metals from corrosion in ocean engineering and process industries. It has been proved that the adhesion between epoxy coating and metal is a key factor that affects their service life of the coating. However, interface between epoxy coating and metal substrate is usually combined by weak van der Weals force or secondary bond, which limits the protective performance of coatings. This work aims to translate the interface state from the physical adsorption to chemical bonding so as to increase the service life of epoxy coating. A kind of reactive resin gamma-APS/EP with hydrolysis characteristic was prepared using gamma-aminopropyltrimethoxysilane (gamma-APS), and used as a coating filler with different contents of 0.5%similar to 10%. Both dry and wet adhesion strength of epoxy coatings with different contents of gamma-APS/EP were examined, the resistance to aggressive medium of epoxy varied with the contents of gamma-APS/EP was evaluated by water absorption measurement, and the structure and composition of the coating/metal systems were characterized by using SEM, XPS, DSC and FTIR. The results showed that amino groups in gamma-APS/EP disappeared and methoxysilyl groups (Si-O-CH3) were remained after the synthesis process. Adhesion strength of the epoxy coating with metal substrate was significantly enhanced by introducing gamma-APS/EP. Moreover, the dry adhesion strength of epoxy coating with 3%gamma-APS/EP reached the maximum value of 12.4 MPa, which was twice the strength of pure epoxy, and was decreased with the content of gamma-APS/EP further increasing. Meanwhile, wet interface adhesion strength of epoxy coating with 3% gamma-APS/EP was still kept about 7.4 MPa after 900 h immersion in 3.5%NaCl, more than three times of pure epoxy coating. And also, epoxy coating with 3% gamma-APS/EP showed the best performance with lower saturated water absorption. The chemical bonding can be obtained by the generation of oxane on the interface resulting from the reaction between the synthesized reactive resin and the hydroxyl on the metal surface after the reactive resin was added in the epoxy resin. Furthermore, the content of gamma-APS/EP affected the number of chemical bonds at the interface, the hydrophilicity and the bulk (d)ensity of coating. Finally, an interfacial chemical bonding mechanism was proposed.
关键词	epoxy coating gamma-aminopropyltrimethoxysilane chemical bonding
资助者	National Natural Science Foundation of China ; China Postdoctoral Science Foundation
DOI	10.11900/0412.1961.2018.00121
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51401217] ; China Postdoctoral Science Foundation[2017M613383]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000455945800008
出版者	SCIENCE PRESS
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/131428
专题	中国科学院金属研究所
通讯作者	Wu Hang; Yang Yange
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Liaoning, Peoples R China 3.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 4.Navy Coating Anal & Test Ctr, Beijing 102442, Peoples R China
推荐引用方式 GB/T 7714	Cao Fachun,Wu Hang,Yang Yange,et al. Study on Chemical Bonding Between Epoxy Coating and Metal Substrate Using gamma-Aminopropyltrimethoxysilane to Modify Epoxy Resin Molecule[J]. ACTA METALLURGICA SINICA,2019,55(2):238-248.
APA	Cao Fachun,Wu Hang,Yang Yange,Cao Jingyi,Zhang Tao,&Wang Fuhui.(2019).Study on Chemical Bonding Between Epoxy Coating and Metal Substrate Using gamma-Aminopropyltrimethoxysilane to Modify Epoxy Resin Molecule.ACTA METALLURGICA SINICA,55(2),238-248.
MLA	Cao Fachun,et al."Study on Chemical Bonding Between Epoxy Coating and Metal Substrate Using gamma-Aminopropyltrimethoxysilane to Modify Epoxy Resin Molecule".ACTA METALLURGICA SINICA 55.2(2019):238-248.